Combined engine and dynamo-electric machine.



N0. 632,897. Patented Sept. I2, |899.

' C. C. COWAN. COMBINED ENGINE AND DYNAMU ELECTRIC MACHINE.

(Application filed Mar. 18, 1899.) .No Model.)

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No. 632,897. Y Patented Sept. I2, I899. C. C. COWAN.

COMBINED ENGINE-ANDDYNAM0 ELECTRIC MACHINE.

(Application led Mar. 18, 1899.) (No Model.) 2 Sheets-Sheet 2 we nofws PETERS co. PnuToMTHn.. wAsHlNuTou, u. c.

UNITED STATES PATENT OFFICE.

("flIARIiES O. CO WAN, OF MEMPHIS, TENNESSEE, ASSIGNORy TO '.lIIE lVIIIT- FIEIID COMPANY, OE SAME ILAOE.

COMBINED ENGINE AND D-YNAMOELECTRIC MCHINE.

SPECIFICATION forming part of Letters Patent No. 632,897, dated September 12, 1899. Application filed March I8, 1899. Serial No. 709,564. (No model.)

To M Uff/mnt Lt lit/ty con/ecrit:

Be it known that I, Guantes (j. Cowan, a citizen of the United States, residing at Memphis, in the countyof Shelby and State of Tennessee, have invented a certain new and useful Improvement in a Combined Engine and Dynamo, of which the following is a specificat-ion.

My invention relates to various new and useful improvements in combined engines and dynamos ofthe general type described and claimed by me in my application for Letters Patent illed September It, i898, numbered serially 690,900.

In combined engines and dynamos of the type which I have invented and which I describein said application an engine is secured or attached directly to an element of the dynamo-such, for example, as to one of the poles thereof or to the yoke connecting the pole-pieces said engine heilig removable from the dynamo either in whole or in part. In my present invention I provide a dynamo of any suitable type and mount in line with the armature-shaft thereof one or more engine-cylinders removably secured directly to the dynamo. Preferably two engine-cylinders will be employed, bolted to the two polepieces of the dynamo diametrically with respect to the armature-shaft, a single reciprocating piston-rod connecting the pistons of said cylinders and actuating the crank on the armature-shaft. By means of this construction I secure a combined engine and dynamo which can be built very cheaply, whichl will be ellective in use, which can be readily set up and taken apart, and which will be portable and compact in construction.

In order that my invention may be better understood, attention is directed to the accompanying drawings, forming part of this speciication, and in which- Figure I is a side elevation of a well-known form of dynamo equipped with my present improvements, two engine-cylinders being shown; Fig. 2, a section taken through the armature-shaft and eccentric Fig. 3, aseotion on the line 3 3 of Fig. I; Fig. Lt, a detail elevation illustrating a modification wherein only a single engine-cylinder is used, and Fig. 5 a section on the line 5 5 of Fig. 4t.

In all of the above views corresponding parts are .represented by the same numerals of reference.

The dynamo illustrated in the drawings is, as stated, of a well-known type, comprising a single energizing-core l and two pole-pieces 2 2, mounted at the extremities of said core. The armature 3 is carried on a shaft Lt and rotates between said pole-pieces. rI he'shaft is mounted in bearings formed in bracketarms 5, connecting the two pole-pieces, whereby a very strong and efficient construction is secured. Preferably two engine-cylinders t3 6 are bolted to the pole-pieces 2 2 diametrically with respect to the armature-shaft 4. These engine-cylinders are of any suitable construction and are provided with pistons? therein and with valve-chests 8 8, controlled by valves 9 i), to admit the steam properly to the cylinders. The pistons 7 7 are connected together by a single connecting-rod IO, which reciprocates back and forth in a line with the crank of the armature-shaft 4. The connecting-rod lO isformed with a slide-head ll therein, the passage therein extending at right angles to the path of movement of the said connectingrod. Preferably the slide-head Il is mounted in two horizontal guides l2 12, connecting the pole-pieces, as shown. In order to reduce friction to a minimum, I consider it desirable to make use of `a ball-bearing for lthe lower guide with a horiZontally-arranged dynamo' or for-both guides when a vertical apparatus is employed. The lower face of the slidehead Il., Fig. l, may therefore be provided with a groove Il, a similar groove 13 being formed in the adjacent guide I2 anda ball I5 being mounted therein. The extreme positions of the slide-head are shown in full and dotted lines in the drawings, from which it will be clear that the ball i5 will move throughout the entire length of both grooves, while the latter are moved with respect yto each other. Mounted within the slide-head Il is a slide IG, carried on afpinl, formed on a crank IS on the dynamo-shaft 4E. The valves 9 are preferably semirotary valves of the well-known type and are actuated by arms 19 19, connected together by a rod 20, so that they operate in synchronism. An eccentric 2l. is mounted on the dynamo -shaft 4t, be-

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tween the bracket 5 and the ciank 18. Engaging with said eccentric 21 is an eccentricstrap 22, connected by a rod 23 to one of the arms 19 of the valves O 9. Steam is admitted to the two valve-chests S S through a pipe 24, connecting said valve-chests and to which a pipe 25 leads from the steam-supply, the lastineiitioiied pipe being provided with a tlirottie-valve 26 therein. Any desirable forni of governor may be used.

Instead of making use of two cylinders G t, as described, a single cylinder alone may be employed, as shown in Fig. 4C. In this case the connecting-rod 10 at the end opposite the cylinder may be extended and arranged to work in a guide 27, made perfectly rectangular in cross-section, as show ii in Fig. 5, so as to maintain the slide-liead 11 always in the plane of rotary movement of the slide 1G. The guide 2T may obviously be dispensed with or it may be used instead of the guides 12. It will furthermore be apparent that with a double-cyliiider arrangement the guides 12 inay be omitted, the cylinders themselves serving to properly guide the reciprocating parts.

The operation of my invention in either of its forms is readily apparent. Steam being admitted to one or both of the cylinders reciproeates the connecting-rod 10 back and forth, turning the arniature-shaft through the slide head 11, slide 1G, and crank 18. The rotation of the armature-shaft'operates the valves through the eccentric 21.

It will be of course understood that instead of applying one or bot-h engine-cylinders to the pole-pieces of a dynamo the said enginecylinders may be removably carried by any other element thereof to which they may be conveniently and effectively secured-such, for example, as one of the yokes which connects the pole-pieces.

Having now described my invention, what I claim as new, and desii'e to secure by Letters Patent, is as follows:

1. The combination with a dynamo-electric geiieiator, its armature-shaft and a crank thereon of a pair of power-cylinders i'eniovably mounted on said dynamo, pistons working in said cylinders, a piston-rod common to both pistons, and means operated by said pistoii-rod for rotating the aforesaid crank, for the purpose set forth.

2. The combination with a d ynaino-electric generator having vertically-extended polepicces or shoes, an ariiiatnre revoluble between said pole-pieees, the armature-shaft, and a crank thereon; of a pair of power-cylinders removably mounted on said pole-pieces, pistons working in said cylinders, a pistonrod common to both pistons, and means operated by the piston-rod for rotating the aforesaid crank, for the purpose set forth.

3. The combination with a dynamo-electric generator having` vertieally-extended polepieces or shoes, an armature revoluble between said pole-pieces, the armature-shaft and a crank thereon; of a pair of power-cylinders removably mounted on the vertical faces of the pole-pieces, pistons working in said cylinders, a piston-rod common to both pistons, and means operated by said rod to i'otate the aforesaid crank, for the purpose set forth.

Ll. The combination with a dynamo-electric generator, its armature,ariiiature-sliaft,and a crank thereon; of a pair of power-cylinders removably mounted on said dynamo, pistons working in said cylinders, a piston-rod coiniiion to both pistons, means operated by said rod for rotating the aforesaid crank, a valve mechanism controlled from the armatureshaft, and suitable distributing and exhaust ports controlled by the valves of said meehaiiisin, substantially as and for the purpose set forth.

5. rlhe combination with a dynamo-electric generatorhaving vertically-extended polepieces or shoes, an armature revoluble between said pole-pieces, a horizontal shaft for said arniat-ure, and a crank on said shaft; of a steaiii-en gine reni ovably mounted on the vertical faces of the pole-pieces with its piston-l rod in a plane perpendicular to the axis of rotation of the armature-shaft, and means operated by said piston-rod for revolving the crank on said sh'aft, for the purposes set forth.

G. The combination with a dynamo-electric generator, having vertically-extended polepieees or slices, the armature revoluble between said poles, the armature-shaft and a crank thereon; of a pair of power-cylinders mounted on the vertical faces of the polepieces, pistons working in said cylinders, a piston-rod common to both pistons and having a cross-head, guides for said cross-head, and a block on the eraiik-piii of the aforesaid shaft having sliding motion on guides in said cross-head, substantially as and for the purpose set forth.

7. The combination with a dynamo-electric generator having vertically-extended polepieces, the armature revoluble between said pole-pieces, the armature-shaft, and a crank thereon; of a pair of power-cylinders mounted on the vertical faces of the pole-pieces, pistons working in said cylinders, a pistonrod common to both pistons, a cross-liead formed integral with the piston-rod, guides for the cross-liead, a rolling bearing in the lower guide, and a block on the pin of the aforesaid crank, sliding in ways in the crosshead, substantially as and for the purposes set forth. f

This speciiication signed and wi tncssed this 2d day of December, 1898.

CHARLES (Il. COVAN. `\\'itnesses:

B. 11. FINLEY, FRED. 1I. Jonas.

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